Vulnerability details

CVE-2026-117981

Privilege escalation in the Toolkit component

CVSS 3.1

9.8Critical

Official description

Privilege escalation in the Toolkit component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published: 2026-10-27
Last updated: 2026-11-05
State: Published
Assigner (CNA): mozilla
Kolun priority: 25 · Low

Exploit prediction (EPSS)

0.46%

Probability of exploitation in 30 days

40.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-269
Improper Privilege Management